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Clearing My Sewer

Do Chemical Root Killers Work?

Sewer back-ups, clogs, and sewer problems are often the result of roots growing in the main sewer line. 

A sewer backup is when wastewater comes back through your drain because your main sewer line is clogged.

Blockages forming in main sewer pipe because of root growth

Emergency Sewer Backups

Sewer back-ups, clogs, and sewer problems are often the result of roots growing in the main sewer line. 

A sewer backup is when wastewater comes back through your drain because your main sewer line is clogged.

The sewage will return through the lowest drain in the house. In Alberta, sewage most often returns through a basement floor drain, basement shower or tub drain, basement toilet or basement cleanout. 

Do-chemical-Root-Killers-Work

If you haven’t had a sewer backup, it’s worth it to do everything possible to avoid having one!

Avoid a sewer backup by scheduling a sewer camera inspection. This ensures you are aware of faulty sewer pipes or root infestations before a major sewer backup happens! 

Roots most often grow inside a sewer line because the pipes are:

  • aging, rusting, and leaking
  • cracked or decomposing
Rusted, Cracked or Collapsing Sewer Pipes, Pipe Belly, Sewer Pipe Root Invasions, Misaligned Sewer Pipe

As the pipes and pipe joints wear out, small leaks can allow roots to enter the sewer pipe. Even a crack the size of a hair can allow a tiny root to make home inside the sewer pipe. 

Over time, the root establishes in the sewer pipe and grows into a root ball. As the roots grow in size, they act as a net collecting solid waste and debris as wastewater passes through the pipe. 

Over time, a clog will form near the root growth, eventually making it impossible for waste to pass through the sewer line. The result is a sewer backup, and wastewater filling up your basement. Yuck!

Ways to Defend Against Roots

The best way to ensure roots don’t invade your sewer line is to repair or replace your sewer pipes. Repairing or replacing your pipes ensures that roots will not find their way back into your sewer line, keeping them out for good. 

The second best way to deal with a root invasion in your sewer line is to remove them now, and then. Root removal is a temporary fix. It doesn’t address the cause of roots entering your sewer line.

The best option for maintaining your sewer lines, if you know roots are growing inside, is to use an auger, hydro-jet, or chemically treat the roots in your sewer line.

Auger

An auger, sometimes called a snake, will drill through the clog, clearing roots and debris. Augering the sewer line is a short-term solution, and the roots will grow back eventually.

Hydrojet

A hydrojet is a high-pressure hose. The hydro jet sewer line clearance is not the best choice if you are having an emergency sewer backup. If there is a clog in the main sewer line, and water can not pass, then the water will return, creating a bigger sewer backup.

Chemical Treatments

Chemical root treatments are a short-term solution to remove roots that are growing in your sewer line. Repairing your sewer line is the only way to prevent roots from returning.

Buyer beware, not all chemical treatments are created equal. 

Consider these 4 tips before choosing to use a chemical root treatment! 

  1. A single treatment of sewer drain root killer will not: 
    • Repair cracks in the sewer lines and drain pipes
    • Slow or stop root growth forever
  2. Applying root killers is a band-aid solution to the bigger problem. You will eventually either have to do additional root treatments, auger, repair, or replace the pipes.
  3. Once roots enter the drain system, it is an ongoing problem to keep the roots at bay. Because the sewer pipes are rich in water, oxygen, and organic waste (fertilizer), the roots can be established quickly. 
  4. Root killers work best when the pipes have already been cleared of existing roots by augering or hydro-jetting.

Foam Root Killer

Foam root killers are the most effective way to chemically kill roots. 

Foam is more effective than other chemical root treatments because it coats the entire pipe interior, reaching all the root intrusions.

The foam fills the pipe top to bottom and is therefore able to reach all the root intrusions. It sits in the main sewer line for a few hours, and the sewer can’t be used during the treatment.

Consider using an experienced plumber to apply the foam root treatment for the following reasons:

  • Foam Root Killer is poisonous. An experienced plumber can carefully apply the treatment without having large amounts of foam backup.
  • Ensuring the foam reaches the targeted area is challenging. Especially if the pipes are long, and depend on where the root intrusions are. An experienced plumber will calculate the necessary amount of foam root killer to reach the intended target. 
  • It is most effective to auger the roots before applying a foam root killer to slow down root growth for a longer period than with a chemical treatment alone.
  • A camera inspection can be provided before and after the treatment, to verify the effectiveness of the treatment. Multiple treatments may be required.

Hardware Store Root Killer

Skeptical? We are too! 

Many brands of chemical root killers claim the roots growing in your sewer lines will die, disintegrate, and be flushed through the sewer line, but customers report a wide range of results. 

Some report positive experiences, but others warn you not to waste your time and money.

Consider this before purchasing hardware store chemical root killers.

  • By the time the roots become an obvious problem, chemical root killers may take too long to take effect. This is not the time to use root killers! 
  • Dissolvable root killers do not coat the entire inside of the pipe. They will reach the bottom of the inside of the pipe, but will not reach the top side  of the pipe. In contrast, foam root killerscoat the entire inside of the pipe.
  • The effectiveness of the root killer can only be seen with a camera line inspection.
  • Read the online reviews before purchasing the chemical root killer.
  • Multiple treatments may be required.
  • Pipe repair will eventually need to be done to prevent further sewer problems and intrusions.

DIY Root Killer for Sewer Lines

Some people see that because DIY root killers are cheaper short term that they are saving money. Who doesn’t want to save money?

But using DIY root killers and putting off needed repairs may cost you more money in the long run.

Some of the most popular DIY chemical root killers for sewer pipes are copper sulphate and salt. 

Copper Sulphate as Root Killer for Sewer Lines

Copper sulphate is not an ideal chemical root killer. 

Pros and cons….

First, the pros

  • It’s not very expensive — if you can even find it.

The cons

  • Copper sulphate doesn’t foam, so it may not disturb or kill the root hairs and root balls growing at the top of the sewer pipe. 
  • Copper sulphate has a negative environmental impact and is actually illegal in some jurisdictions.😳 Yikes! (It is almost impossible to find in Canada.) 
  • Copper sulphate is highly poisonous and creates toxic fumes.
  • Multiple treatments are needed to be an effective root killer in sewer pipes. 
  • A temporary solution at best, and will not prevent long-term root growth.

Salt as Root Killer in Sewer Pipes

Salt rock is a popular DIY solution, but its effectiveness is questionable.

Very questionable! 😕

The idea is that a high quantity of salt flushed down the toilet will kill roots as the dissolved salt passes through the sewer drain pipes. 

In short, professionals do not recommend this solution for the following reasons:

  • It is not as effective as foam root killers because it may not coat the entire inside of the pipe, leaving roots at the top of the pipe untreated. 
  • Rock salt needs to dissolve to be effective, and might not dissolve before leaving the main sewer line.
  • Salt rock could cause corrosion to cast iron pipes, weakening the pipes further.

If you are concerned about root growth in your sewer lines, schedule an appointment with one of our technicians. A camera inspection will provide the information needed to help you make the best choice for your sewer line maintenance needs.

Learn More and book a call for An Inspection!

Read more about how you can Avoid and Prevent Sewer Backups here!

Learn about The History of Sewer Pipes in Calgary

Sewer Line Camera Inspection

Schedule a service evaluation by calling The Gentlemen Pros today to prevent and repair your main sewer line problems. 

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